Filter for air and other gases



Dec. 11, 1928. 1,695,237

E. L. JOSEPH I FILTER FOR AIR AND OTHER GASES Filed Nov. 18, 1924 Fig.3-a

\NYENTO ATTORN Y Patented fDec. 1 1, 1 928;

' UNITED .STATES PATENT OFFICE.

EDWARD LIONEL JOSEPH, F LQNDON, ENGLAND.

FILTER FOB AIR- OTHER GASES.

Application filed somber 1a, 1924, Serial No. 750,524, and in GreatBritain am 7, 1924.

4 Variousmeans have been proposed for filtering air and other gases,from a simple screen of reticulated material to elaborate washingdevices in which the gas is passed 5 through an atmosphere of water orother liq-' uid in a finely divided state. The former have thedisadvantage that the material soon becomes clogged and must be replacedwhilst the latter are expensive to erect and run, the air or othergasmust usually be dried before use, and in cold weather heating isnecessary. The object of the present invention is a simple -formof'apparatus which vcan be cheaply and rapidly constructed, iseconomical in use and requires very little attention.

According to this-invention afilt'er comprises a series of corrugated,crimped or similar metal plates superimposed in spatialrelationship andsupported within an: inner frame so as to form sinuous -passages, saidinner frame being removably mounted in an outer frame or the like inorder that said inner frame and plates'may be removed and dipped into aheavy-viscous oil, glycerme or the like adapted to retain solid matterin the air or gas. Preferably the plates are assembled and retained inthe removable inner frame by means of rods'passed through apertures insaid frame and plate'sfand through tubular distance pieces.

In the accompanying drawings Figure 1 is a front elevation of one formof filter constructed in accordance with this invention,

Figure 2 is a section on the line 2-2 Figure 1,*and' Figure 3 is asimilar partial section on" an enlarged scale. I

As shewn, an-outer rectangular frame a s formed with an inturned flangeb and 1s 40 adapted to receive a removable frame 0 formed with anout-turned flange (2 adapted to-overlie the flange b. The frame a isfurnished with staggered handles e e in order that it may be liftedreadily into. and out of the frame a and its flange is formed with keyhole slots f adapted to co-operate with screws, headed ins or the like 9on the flange b. Vertically disposed between, and clamped to, the upperand lower walls of the frame a are two pairs of rods h h and on theserods is arranged in spatial relationship a series of crimped sheet metalplates .7 tu bular distance pieces k being disposed on the rods hbetween the flat ends of adjacent plates before said rods are clamped inposition. t will be observed that the frame particles may settle.

a and the plates j carried thereby can be removed easily from the framea (which ma be regarded as a permanently fixed'structureg and replacedafter being dipped in a heavy viscous oil. When air is forced or drawnthrough the filter it is. constrained to pass through a series ofsinuous assages in which eddy currents are set up, with the result thatanysolid impurities in the air are caused to mpinge on, and adhere tothe oily surfaces of the walls of said passages. The sinuous passagesare provided by making the crimps or corrugations relatively deep andwith sharp angled portions, as shown in Figure 3, and disposing theplates 9' sufliciently close together to intermesh but at the same timeto be spaced apart. This structure is obtained by the relatively shortspacing sleeves k which may be varied within the prescribed limlts toprovide sinuous passages of different heights and at the same time tocause the air, and particles carried thereby, to impinge against theinclined portions of the plates. The vertical rods it hold the plateshorizontally so that the sinuous passages present superposed series orrows of deep depressions or pockets between narrow inclined passageswhich provide alarge number of inde ndent deep traps withln which areset up e dy currents, insuring impact against the wall of the traps, andzones of quietude in which the dust This insures the independentseparation of the foreign matter from the air at various pointsthroughout the thickness, height and width of the filter. When requiredthe frame 0 may be removed, dipped in a cleansing agent, again dipped inoil or the'like and replaced.

The frames such as a are preferably formed with any convenientinterlocking means (not shown) so that any number of such frames may besecured together in juxtaposition to build up a filter of any desiredcapacity.-

The form of the plates j may be variedaccording to requirements, whilstin order to,

passages extending from top to bottom of the frame. Water or othersuitable fluid in bath form is usually disposed at the bottom ofstratum.

tion to the rior art at the bottom of the frame because the particlesseparated from the upper stratum drop into the adjacent "lower stratumand are carried forward therebyat least a short distance beforeseparation from the second stratum together with the particles initiallycarried by the second stratum.

Thus, of its own particle's plus the particles separated from all of thesuperposedstrata, and at each lower stratum the falling particles aregradually advanced through the filter.

The result is that the-lower strata entrain.

more particles in passing than they initially-carried.

The present invention separately and thoroughly entraps the particlesfrom the sepathrough the filter 'rate strata, and prevents the particlesfrom an ,upper stratum falling into a lower stratum.

In the the articles collected from the upper strata are eposited in thelower strata; making it harder to clean the lower strata. Thusobjecdevices is applicable to the type utilizing a viscous coating onthe bars as there is a downward accumulation of tabs particlesthroughoutthe height of the ars.

What I claim is j 1. A filter for airand other gases, compris in anouter frame, an inner frame removab y mounted in the outer frame andopen at its front and rear facesto admit passage of air through theframe and closed at its opposite sides, and a plurality of platesarranged horizontally in superposed relation in the inner frame andextending between the front and rear faces thereof to divide the airinto each lower stratum has the burden Thelowermost stratum is as easilycleared of its particles as is the top-most prior art such is not thecase as independent horizontal strata, said plates having relativelydeep and sharp transverse crimps extending from side to side in theinner frame, said plates being spaced apart with the sharp angleportions of one plate overlapping the sharp angle portions of anadjacent plate to provide narrow passages between the inclined portionsof adjacent plates and the angle portions of adjacent plates, saidnarrow assages between the inclined portions'of t 'e plates being ofless cross sectional area than that of the wide and deep pockets betweenthe crimps of adjacent plates, the

deep pocket inthe angle of each crimp providing a zone of quietudebetween adjacent narrow passages in which dust particles may beentrapped.

w 2. A filter ,for air and other gases, comprising an outer frame, aninner frame removably mounted in the outer frame an open at its frontand rear faces to receive a current of air therethrough and closed atits opposite sides, vertically disposed rods in the inner frame,horizontal plates mounted on the rods and extending between the frontand rear faces of the frame, spacers on the rods between the plates toseparate the same wide and deep pockets'between 1 vertically and dividethe air stream into ina dependent strata, said plates being crimped onrelatively sharp angles with relatively deep inclined portions toprovide at all spac ing adjustments of adjacent plates relatively deeptrap pockets between the angles of adjacent plates and relatively narrowpassages at opposite sides of the pockets between the inclined portionsof the adjacent plates, said narrow passages between the inclinedportions of the plates being of less cross sectional area than that ofthe wide and deep pockets between the crimps of adjacent plates.

In testimony whereof I afiix my signature.

. EDWARD LIONEL JOSEPH.

